Original title: High-Quality Vector Field and Direct Vorticity Estimation Uusing the Affine Correlation Method
Authors: Gronát, Petr
Document type: Papers
Conference/Event: ENGINEERING MECHANICS 2010, Svratka (CZ), 2010-05-10 / 2010-05-13
Year: 2010
Language: eng
Abstract: We present a correlation method for direct vorticity computation of the fluid velocity field. The correlation method allows the affine transformation of a correlation window. It is shown that Lagrangian field of displacements is locally affine considering linear terms only. Using the Normalized-Cross-Correlation (NCC) combined with affine transformation and Newton-Raphson iterative method, six parameters defining this transformation are estimated. Subsequently, using these parameters, both displacement and vorticity can be computed, hence, these properties are being obtained for every single pixel directly during the correlation procedure.
Keywords: affine correlation; normalized cross correlation; PIV; vortex detection
Project no.: CEZ:AV0Z20760514 (CEP), GA101/08/1112 (CEP), GAP101/10/1230 (CEP)
Funding provider: GA ČR, GA ČR
Host item entry: Engineering Mechanics 2010, ISBN 978-80-87012-26-0

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0191671

Permalink: http://www.nusl.cz/ntk/nusl-42180


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Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers